time-based: nou DeltaTime + migrada escena Logo (constants en segons, fora counters)

source/core/system/delta_time.cpp

@@ -0,0 +1,22 @@
+#include "core/system/delta_time.hpp"
+
+#include <SDL3/SDL.h>
+
+namespace DeltaTime {
+
+    namespace {
+        Uint64 last_time_ms = 0;
+    }
+
+    void reset() {
+        last_time_ms = SDL_GetTicks();
+    }
+
+    auto tick() -> float {
+        const Uint64 NOW_MS = SDL_GetTicks();
+        const float DELTA_S = static_cast<float>(NOW_MS - last_time_ms) / 1000.0F;
+        last_time_ms = NOW_MS;
+        return DELTA_S;
+    }
+
+}  // namespace DeltaTime